Checking The Ignition Device - Biasi RIVA COMPACT M90E.24S User Manual And Installation Instructions

Commissioning
Fig. 7.7
Refer to the table gas pressures at the burner in the
sections 4.5, 4.6 or 4.7 for appropriate value.
7 Having finished this procedure, reset dip ---
switch "3" to the ON position.
7.8 Adjustment of useful c.h.
output
If the burner function selector (dipswitch number
4 on the main P .C.B.) is set to the 'ON' position it
will activate the re--- ignition delay period of ap-
proximately 4 minutes. When dipswitch number 4
is set to the 'OFF' position there will be approxi-
mately 30 seconds re--- ignition delay period.
Whilst checking or adjusting the c.h. output, and
fault finding on the boiler it may be necessary to
switch the re--- ignition delay mechanism (dips-
witch 4) to the 'OFF' position.
Refer to the diagrams shown in Fig. 7.8, Fig. 7.9 or
Fig. 7.10 and select the correct central heating
output gas pressure to meet with the central heat-
ing system requirements.
With the boiler operating in c.h. mode, use a suit-
able screwdriver to turn the adjustment potentio-
meter marked "RISC" (Fig. 7.7). Rotating the
potentiometer anti--- clockwise reduces the maxi-
mum supply current to the gas modulator device,
and thus reduces the gas pressure to the burner.
+
RISC
+
ACC
ON
1 2 3
4
OFF
kW
32
30
28
26
24
22
20
18
16
14
12
10
2 3 4 5 6
M90E.24S
M90E.28S
M90E.32S
Fig. 7.8
kW
32
30
28
26
24
22
20
18
16
14
12
10
6 9 12 15
M90E.24S
M90E.28S
M90E.32S
Fig. 7.9
Natural (G20)
7 8 9 10 11 12
mbar
Butane (G30)
18 21 24 27
mbar
31